What will stay colder in the sun longer Coke Gatorade or water?

The can of coke will stay colder for about 15-20 minutes longer than a bottle, but if you want the can to stay cooler for about 24 hours here's a nice trick. Buy one of those machines that are designed to shake up thick-shakes, place the can of coke inside, shake for 20 mins, take it out and apply directly to the forehead and open it up for a nice cool refreshing drink.